20542564

素因数分解:

$2^2\times 7^2\times {\mathrm{163}}^1\times {\mathrm{643}}^1$

素因数の和:824

約数の個数: 36

約数和(自身を含む): 42140784

約数和(自身を除く): 21598220

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 163, 196, 326, 643, 652, 1141, 1286, 2282, 2572, 4501, 4564, 7987, 9002, 15974, 18004, 31507, 31948, 63014, 104809, 126028, 209618, 419236, 733663, 1467326, 2934652, 5135641, 10271282, 20542564]

約数ペア:

[(1, 20542564), (2, 10271282), (4, 5135641), (7, 2934652), (14, 1467326), (28, 733663), (49, 419236), (98, 209618), (163, 126028), (196, 104809), (326, 63014), (643, 31948), (652, 31507), (1141, 18004), (1286, 15974), (2282, 9002), (2572, 7987), (4501, 4564)]